Apparatus for shaping flanges on dished heads



Dec. 13, 1949 J. H. L. OLSON APPARATUS FOR SHAPING FLANGES ON DISHED HEADS Filed Jan. 31, 1947 '3 Sheets-Sheet 2 5 I 1552 44 40 i; a 56 .43 v 58 5 40 62 62' A 27 a? I 5 g: i 2 as j yiozs' Us. La :2. f

- Ihwentor I H. Leslie Olson, deceased M00 0/50 admmllsfra fr'ix B1;

(Zttornegs Dec. 13; 1949 J. H. 1.. OLSON I APPARATUS FOR SHAPING FLANGES ON DISHED HEADS Filed Jan. 31, 1947 s Sheets-Sheet s 6 2 a a Q% 4 a M m W 7 3 A may. a a 5 6 3 w J w 5 F 4 5? o L 76 W 7% :g m 6 E 0 J a E a 7 5 w j m 8 F1? 5 MM E? am W8 7 E E W. 0% a w dttomegs Patented Dec. 13, 1949 APPARATUS FOR SHAPING FLANGES ON DISHED HEADS J. H. Leslie Olson,

deceased, late of Oklahoma City, Okla., by Mac Olson, administratrix, Oklahoma City, Okla, assignor to Black, Sivalls &

Bryson, Inc., Oklahoma tion of Oklahoma City, Okla., a corpora- Application January 31, 1947, Serial N0. 725,704

14 Claims. 1

This invention relates to apparatus for shaping flanges on dished heads adapted for closing the ends of vessels or tanks and has for its principal object to provide an apparatus of this character adapted for attachment to a boring mill or similar machine.

Other objects of the invention are to provide an apparatus that produces an annular offset in the flange of such heads whereby the oifset portion of the flange is utilized as a guide and back-up bar when attaching a head to the wall of a vessel or tank; to provide a flange offsetting apparatus which operates without transferring stress into the boring mill with which it is used; to provide an offsetting apparatus including a collapsible jig adapted for insertion in the concavity of the heads for backing the head flanges and which is equipped with the offsetting form or anvil; to provide an outer ring for supporting the head solidly in place on the rotary table of a boring mill while an oifset is being rolled into the flange of the head; to provide the jig with an inside track for the pressure or backing roller of the offsetting mechanism; to provide visible means for indicating the completion of an offset; and to provide an offsetting apparatus wherein the spinning and backing roller supporting levers are pivotally mounted and self-adjustable with respect to the flange to be offset.

In accomplishing these and other objects of the invention hereinafter pointed out, improved structure has been provided, the preferred form of which is illustrated in the accompanying drawings wherein:

Fig. 1 is a section through an end of a tank equipped with a head having an offset flange formed with an apparatus constructed in accordtime with the present invention.

Fig. 2 is a perspective view of a flange offsetting apparatus constructed in accordance with the present invention with the head carrying parts supported on the rotary table of a boring mill and carrying a tank head with the flange supported in position to be offset against the forming face or anvil of the jig by means of spinning and back-up rollers supported on levers which are pivoted on the ram of the boring mill.

Fig. 3 is a vertical section through the head,

supporting ring, a head supported therein, and the inner sectional jig, illustrating the method of setting the inner jig, the table of the boring mill being shown in elevation.

Fig. 4 is a perspective view similar to Fig. 2 but showing the pressure rollers and their operating mechanism removed.

Fig. 5 is a horizontal section showing the head clamping ring, inner sectional jig and the roller supporting levers. in plan, the actuating mechanism for the levers and its connection with the levers being shown in section.

Fig. 6 is a cross section through the spinning and backing rollers on the line 66 of Fig. 5.

Fig. '7 is a section on the line '|1 of Fig. 5.

Referring more in detail to the drawings:

l designates a flange offsetting apparatus constructed in accordance with the present invention and adapted as an attachment for a standard boring mill 2 which includes a rotary table 3 adapted to be driven with respect to the ram (not shown) that supports the tool carriage over the table, the mill being shown somewhat diagrammatically as specifically it forms no part of the present invention. The apparatus l is employed to form offsets 4 in the flange 5 of dish-shaped head 6 as shown in Fig. I. The offset 4 is for the purpose of providing an annular guide and backing portion 7 for engaging within the end of the cylindrical wall 8 of the tank. In the tank illustrated the head 6 is of substantially elliptical shape and rounds into the flange 5 as indicated at 9. The offset 4 provides a shoulder ll) of substantially the width of the thickness of the wall 8 and the terminal edge is turned slightly inwardly as at El to facilitate entrance of the ofiset portion into the open end of the tank when the head is applied thereto. With this construction the heads are readily applied on the tank wall and are adapted to be welded thereto with the inset portion of the flange taking place of the usual back-up bar.

The apparatus l includes a cylindrical sleeve or ring l2 of larger diameter than the external diameter of the head 6 and which is supported concentrically of the table 2 by means of clamps l3 in accordance with the usual manner of mounting a workpiece upon the rotary table of a, boring mill. Fixed to the inner face of the ring I2 and inset from the upper edge I 4 thereof is a flange l5 having a bevelled inner edge It conforming to the curvature of the elliptical portion of the head 6 and whereon the tank head is seated in centering relation with the axis of rotation of the turntable as best shown in Fig. 3. The apparatus I also includes a sectional jig ll comprising a central hub I 8 having an internally threaded axial bore 19. Extending circumferen-' tially 0f the hub stantially register I8 is a disk an adapted to subwith the plane of the supporting ring l5 and which carries a cylindrical sleeve-.

like ring 2|. The ring 2| is fixed to the disk 20 loosely sleeved on the shaft and is fixed fromlongitudinal movement thereon by means of set screws 21 threaded into radial openings 23 of the collar and having ends 29 projecting into an annular groove 39 of the shaft as shown in Fig. 3.

Seated on the larger upper end of the collar is a bearing cup 3| supporting anti-friction thrust bearings 32 in circling relation with the shaft 25 and which are engaged by a collar 33 that is rigidly attached to the shaft. The projecting end 34 of the shaft is of polygonal-shape for application of a wrench or the like to turn the 3;

shaft for moving the cone-shaped collar 24 into wedging relation with a plurality of jig segments 35 that are arranged radially about the shaft and supported upon the hub l8 and cylindrical ring 2|. The sections 35 are of sector shape and each includes a web portion 36 having a substantially arcuate shoe 3'! provided with a tapered inner face 38 corresponding to the cone of the collar 24 and which is adapted to seat directly upon the upper face 39 of the hub Ill.

The outer portions of the webs 36 carry arcuate forming dies 4:: that project above the webs to provide a section of an annular track GI on the inner sides and a section of an annular forming face or anvil 42 on the other side, shaped to impart the desired offset and relief portions in the flange of a head as later described. The dies are removably secured to the sector-shaped webs by fastening devices such as cap screws 43 that extend through radialopenings 44 in the shoes and into threaded openings 45 provided in the edge portion of the web. The sector-shaped sections of the jig when arranged about the collar 24 with the inclined faces 38 engaged with the conical face of the collar, form a substantially continuous annular forming face andinner track for the inner pressure roller as later described. The head portions of the sectors are resiliently retained in contact with the collar by coil spring bands supported within the grooves 4.1 provided in the outer faces of the heads at points above and below the web portions of the sectors inorder to provide a continuous support for the inner pressure rollers as they move across the space between the segments and to prevent deformation of the offset portions of the flanges.- The adjacent side faces 48 and 49 of the sectors are preferably inclined as indicated at 56 and 5| so that a portion of one segment is overlapped by a portion of an adjacent segment and thereby provide a continuous support and effect continuous backing or anvil face for the flange to be offset. The segments are prevented from rotation but are guided for radial movement by radial keys 52 fixed to the respective segments and which operate in radial grooves 53 provided at the upper edge of the ring 21l as shown in Fig. 3.

In order to facilitate setting of the jig within the head and flange to be offset, the annular face portion of the sectors are adjusted vertically to the point at which the offset in the flange is to be made. This adjustment is effected by means of bars 55 that are positioned radially across the web of selected sectors so that the ends of the bars rest upon the hub and flange portions of the selected sectors as shown in Fig. 3. The bars have reduced outer ends 55 which are supported on the edge of the flange to be offset as shown in Fig. 3. The bars 55 are secured in position by screws 51 journalled therein and which have threaded ends 58 that are projected into threaded openings 59 of the webs, the screws being retained in fixed rotative relation with respect to the bars by collars 6B and SI fixed to the shank of the Screws on the respective sides of the bars. The upper ends of the screws have T-shaped heads by which they may be rotated. When the bars 55 have been applied the jig is supported on the rim of the flange to be offset. The jig is tightened within the head by rotating the shaft 223 to draw the conical collar thereon into wedging relation with the tapered faces of the shoe portions of the sections to force the sections outwardly into contact with the inner face of the flange.

The flange is supported against action of-the jig and held solidly in place by a split clamping collar or ring 62 which encircles the flange and is fixed at one point 62 to the supporting ring 12. The ring 62 is contracted by means of a toggle bolt 63 having the head thereof pivotally mounted in a slot 6% formed in the ring at one side of the split and which has its shank 65 extending through the opening in a lug at the opposite side of the split, the lug being formed by providing the ring with a notch 66 which also accommodates a not 5'! on the shank 65.

The pressure rollers include a backing roller 68 that is adapted to operate on the track ll and a spinning roller 69 adapted to operate on the flange to be oifset. The spinning roller has a periphery of a shape to cooperate with the anvil face of the segments to impart the desired shape to the ofiset in the flange. The rollers 58 and 69 are carried on shafts we and Ii that are journalled in pairs of anti-friction bearings 72 and 73 carried within recesses M and '15 of levers l9 and 11. The levers are hingedly connected together somewhat in the manner of tongs to draw the rollers into rolling contact with the track and flange to be formed and to apply the desired forming pressure on the flange when the table of the mill is rotated. The hinge connection is effected by providing one of the levers, .0! example, the lever lfi with an ear it that engages between spaced ears'l9 and 8! on the other lever.

The cars are provided with registering openings BI, 82 and 83 for passing a hinge pin 8 which is carried by the of the boring mill in the manner as the ordinary tool carrying head of such mills.

The levers include arms 85 and 33 which have apertured ends 8'! and 83 for passing a piston rod 89 therethrough. The piston rod 82 carries 2. cylinder 90 and is connected with a piston Fit slidably supported within the cylinder. Blocks Q2 and 98 engage the outer sides of the ter inal ends of the lever arms and have concave for mounting pins .56 and s? through which the rod passes as shown in Fig. 5. The pin as abuts against the head of the cylinder and the pin 91 is internally threaded so that it is adiustably mounted on the rod to vary the relative position of the arms and piston 9!. The pins clocks thus provide hinge joints to compensate for changing angles of the arms with the piston rod ts as and which brings the spinning and backing rollers into rolling contact with the flange and track respectively. As the pressure increases the flange is rolled into contact with the anvil portion of the segments so as to provide the anvil offset in the flange. The pins are retained in seated position with respect to the plates by caps I and IOI that are provided with concave faces I02 and I03 which engage the outer sides of the pins, the caps being secured by fastening devices such as screws I04.

In order to visibly indicate when the levers have moved far enough to complete the offset of the flange, the arm 85 is provided with a switch having an actuating arm I that is adapted to be engaged by an adjusting screw I06 carried by the arm 86. Thus, when the arms have approached each other a distance necessary to complete the offset of the flange, the adjusting screw will engage the switch arm I 05 and close circuit through a signal light I01 that is carried by the arm 85 and which is suitably connected in circuit with the switch and a source of current supply.

In using the apparatus constructed as described, the ring I2 is mounted in concentric relation with the turntable 3 of the boring mill 2 by means of the clamps I3 and the levers I6 and I1 carrying the rollers 68 and 69 are applied to the ram (not shown) of the mill by means of the pin 84. The levers and their actuating mechanism are swung away from the ring I2 by means of a suitable tackle I 08 that is connected with the lever I6 as shown in Fig. 5. The jig I1 is inset within a dished head 6 which is to be provided with an offset 4 in the flange thereof. The bars 55 having been applied to the webs of the selected sectors, the ends 56 thereof are rested upon the edge of the flange 5 to support the jig in proper position. The shaft 25 is then rotated to draw the cone 24 and hub I8 toward each other for forcing the segments of the jig outwardly against the inner surface of the flange 5. The collar 62 is contracted about the flange upon tightening of the nut 61.

The assembly is then applied to the ring I2 on the rotary table. The adjusting bars are then removed leaving the flange of the head free of obstruction when the rollers 68 and 69 are moved in position to engage the track and outer face of the flange. into the cylinder 90 to draw the lever arms and 86 toward each other as the head is being rotated with the turntable. As the pressure is applied the spinning roller 69 oflsets the flange 5 against the anvil portion 42 of the sectors so;

as to form the desired offset 4 in the flange. When the arms of the levers have moved the required distance to effect offsetting of the flange the adjusting screw I06 contacts the switch arm I05 to actuate the switch for closing circuit through the signal or indicator I01. The pressure supply is then shut off and the fluid exhausted from the cylinder 90 to permit the arms Fluid pressure is then admitted to swing apart after which the lever unit is raised and moved out of position with respect to the turntable. The jig carrying the head may then be unclamped from the ring 62 upon loosening the nut 61 after which the head and jig can-be removed from the machine. The shaft 25 is then rotated to move the cone 24 out of wedging engagement with the shoes 31 of thejig sectors whereby the springs 46 are effective in drawing the sectors out of contact with the flange of the head to permit the inset portion of the flange.

sectors to pass the From the foregoing it is obvious that the invention provides a simple apparatus for forming ofisets in the flanges of dished heads and that the pressure applied by the backing and spinning rollers is not applied to the boring mill since the levers carrying the rollers are pivotally mounted to permit self-adjustment of the rollers with respect to the track and flange on which they operate. It is also obvious that the inclined adjacent sides of the sectors permit the backing roll to ride smoothly thereover to avoid any destructive effects on the boring mill that would be brought aboutif the backing rolls must pass over gaps in the track necessary to provide the collapsible jig. It is also obvious that the offsets may be accurately formed in an expeditious and eflicient manner so as to reduce the time required in making such heads.

What is claimed and ters Patent is:

1. In an apparatus of the character described, means for supporting a head having a lateral annular flange to be offset, a collapsible jig adapted to be applied within said flanged side of the head and having a forming face corresponding to the desired offset and having an internal track following the forming face, a backing member engaged with said track, a spinning member adapted to engage said flange in registry with the forming face, means for supporting the spinning and backing members in said operative positions, means for rotating one of said supporting means relative to the other, and means for simultaneously shifting the spinning member toward the backing member for pressing said flange against the forming face.

2. In an apparatus of the character described, means for supporting a head having a flange to be offset, a jig adapted to be applied to said head and having a forming face corresponding to the desired offset and having a track following the forming face, a backing member engaged with said track, a spinning member adapted to engage said flange in registry with the forming face, means for supporting the spinning and backing members in said operative positions, means pivotally mounted the supporting means for said spinning and backing members for selfadjustment of said members relatively to the flange and track, means for rotating one of said supporting means relative to the other, and means for simultaneously shifting the spinning member toward the backing member for pressing said flange against the forming face.

3. In an apparatus of the character described, means for rotatably supporting a head having a flange to be offset, a jig adapted for support in the head when the head is mounted in said supporting means and having an annular forming face corresponding in shape to the desired ofiset to be imparted in. said flange, said jig having a track following the forming face of said jig, a backing member adapted to operate on said track, a spinning member adapted to operate on said flange in registry with the forming face, and means shifting the spinning member toward the backing member to effect displacement of the flange into contact with said forming face when the head supporting means is rotated.

4. In an apparatus of the character described, means for rotatably supporting a head having a flange to be offset, an expansible and contracdesired to secure by Lettable jig adapted for support in the head when the head is mounted in said supporting means enecfeeo having an annular forming face "corresponding in shape to the desired offset to be imparted in said flange, said jig having a track following the forming race :of said jig, a backing member adapted to operate on said track, a spinning member adapted to operate on said flange in registry with the forming face, and means shifting the spinning member toward the backing member to effect displacement of the flange into contact with said forming face.

r 5. In an sappaia'tus of the character described, means for mpporting a head having a flange to be *cdfs'et, a jig adapted to be inserted within the head and comprising a plurality of sectors having races facing said flang and having an inner track, means for moving the sectors into contact with said flange, a backing member adapted to operate on said track, a spinning member adapted to operate on said flange in registry with the forming face, means supporting the backing and spinning members for relative movement, and actuating means 'for shifting the spinning roller toward the backing roller to eiiectdisplacement of said flange into contact with the said forming faces.

6. In an apparatus of the character described, means for supporting a head having a flange to be oflset, a jig adapted to be inserted within the head and comprising a plurality of sectors having forming faces facing said flange and having an inner track, a clamp adapted to encircle the flange in staggered relation with said forming faces, means for moving the sectors into contact with said flange when engaged by said clamp, a backing member adapted to operate on said track, a spinning member adapted to operate on said flange in registry with the'forming face,

means supporting the backing and spinning members for relative movement, and actuating means for shifting the spinning roller toward the backing roller to effect displacement of said flange into contact with the said forming faces '7. In an apparatus of the character described, means for supporting ahead having a flange to be offset, a jig adapted to be inserted within the head and comprising a plurality of sectors having forming faces facing said flange and having an inner track, a clamp adapted to encircle the flange in staggered relation with said forming faces, means for moving the sectors into clamping contact with said flange when engaged by said clamp, a backing roller adapted to operate on said track, a spinning roller adapted to operate on said flange in registry with the forming face, a pair of pivotally connected levers respectively carrying the spinning and backing rollers for relative movement, and means .for'shifting the levers on their pivotal connection to move the spinning roller toward the backing roller for effecting displacement of said flange into contact with the said forming faces.

8. In an apparatus of the character described, means for supporting a head'having' a flange to be offset, rotatable means for mounting the head supporting means, a jig adapted to be inserted within the head and comprising a plurality of sectors having forming faces'facing said flange and having an inner track, means for moving the sectors into clampingcontact with said flange, a backing roller adapted to operate on said track, a spinning roller adapted to operate on said flange in; registry with the forming face, a pair of levers, means for hinging the levers" together,

means for mounting the spinning roller on one of said levers, means for mounting the backing 8 roller on the other iever, means for supporting the hin'g ing means of said levers "from rotation with the rotatabl'e supporting means, and means for drawing-"said levers together-on their liinging means to effect dis lacement of said flange into contact with the forming faces of the jig sectors.

9. In an apparatus of the character described, rotata le means for supporting a head having a flange to be offset, "a 'jig adapted to be inserted Within the head and comprising a plurality of sectors having forming faces facing said flange and having an inner track, a clamp adapted to encircle the flange i-n staggered relation with said forming faces, means *for moving the sectors into clamping contact with sai'd'flang'e when engaged by said clam-p, a backing roller adapted to operate on'saiidtr-ack, a spinning roller adapted to operate on said flange in registry with thefformin face, a pair of levers, means for hinging the levers together, means lor mounting the spinning roller on one of said levers, means for mounting the backing roller -onthe other lever, means for supporting "the hi-nging means of said levers from rotation with the rotatable supporting means, and means for drawing said levers together on their hinging means to effect displacement of said flange into contact with the forming faces of the jig sectors.

16. In an apparatus bf the character described, rotatable means for supporting 'a head having a flange to be oiiset, a jig adapted to be inserted within the head and comprising a plurality of sectors having forming faces facing said flange and having an inner track, a clamp adapted to encircle the flange in staggered relation with said forming faces, means for moving the sectors into clamping contact with said flange when eng'aged by said clamp, a backing roller adapted to operate on said track, a spinning roller adapted to operate on said flange in registry with .the

forming face, a pair of levers, means for hin'jin'g the levers togethenmeans for mounting the spinning roller on one of said levers, means formounting the backing roller on the other lever, means for supporting the h'inging means of said levers from rotation with the rotatable supporting means, and fluid pressure means interconnecting said levers for drawing the levers together on their hin'ging means.

11. In an apparatus of the character described, means for supporting "a head having a flange to be oliset, a jig adapted to be inserted within the head and comprising a plurality of sectors having forming faces facing said flange and having an inner track, means for moving the sectors into clampingc'onta'ct with said flange, a backing roller adapted to operate on said track, said sectors having overlapping adjacent edges to form a substantially continuous track for said backing roller, a spinning roller adapted to operate on said flange in registry with the forming face, means supporting the backing and spinning members ior relative movement, and

means for shifting the spinning roller toward the backing roller to effect displacement of said flange into contact with said forming face.

12. In an apparatus of the character described,.

means for supporting a head having a flange to be ofiset, a jig adapted to be inserted within the head and comprising a plurality of sectors having forming faces facing said flange and having an inner track, a clamp adapted to encircle the flange in staggered relation with said. form ing faces, means for moving the sectors into clamping contact with said flange when engaged by said clamp, a backing roller adapted to operate on said track, said sectors having overlapping adjacent edges to form a substantially continuous track for said backing roller, a spinning roller adapted to operate on said flange in registry with the forming face, means supporting the backing and spinning members for relative movement, and means for shifting the spinning roller toward the backing roller to effect displacement of said flange into contact with said forming face.

13. In an apparatus of the character described, means for supporting a head having a flange to be offset, a jig adapted to be applied to said head and having an annular forming face corresponding to the desired offset to be formed in said flange and having a track following the forming face, a backing member engaged with said track, a spinning member adapted to engage said flange in registry with the forming face, pivotally interconnected levers for supporting the spinning and backing members in said operative positions, means supporting the pivotal connection of said levers to permit adjusting of the spinning and backing members, means for rotating one of said supporting means relative to the other, means for actuating the levers to move the spinning member toward the backing member for pressing said flange against the forming face, and a signal actuated responsive to movement of the levers by said actuating means for indicating that the levers have operated sufficiently to effect the offset in the flange.

14. In an apparatus of the character described, means for rotatably supporting a head having a flange to be offset, a jig having an annular forming face circling the flange and corresponding in shape to the desired offset to be imparted in said flange, said jig having a track following the forming face of said jig, a backing member adapted to operate on said track, a spinning member adapted to operate on said flange in registry with the forming face, and means shifting the spinning member toward the backing member to effect displacement of the flange into contact with said forming face, and an indicator actuated responsive to said shifting means to indicate when the spinning member has moved a predetermined distance relative to the backing member.

MAE OLSON, Administratrix of the Estate of J. H. Leslie Olson,

Deceased.

REFERENCES CITED The following references file of this patent:

UNITED STATES PATENTS are of record in the 

